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Fall back to 169.254.169.254 if DHCP endpoint does not work (unbreak OpenStack)

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This commit is contained in:
reykfloeter 2019-06-02 02:41:36 +02:00
parent 8dfa3c843a
commit aa963100ba
3 changed files with 46 additions and 23 deletions
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51
agent/cloudinit.c
View file

@ -31,31 +31,60 @@
static int cloudinit_fetch(struct system_config *);
int
tryendpoint(struct system_config *sc,
int (fetch)(struct system_config *),
int (next)(struct system_config *))
{
free(sc->sc_endpoint);
sc->sc_endpoint = NULL;
switch (sc->sc_dhcpendpoint) {
case 0:
sc->sc_dhcpendpoint = 1;
if (dhcp_getendpoint(sc) == -1)
return tryendpoint(sc, fetch, next);
break;
case 1:
sc->sc_dhcpendpoint = 2;
if ((sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
return (-1);
}
break;
default:
if (next == NULL)
return (-1);
sc->sc_dhcpendpoint = 0;
return (*next)(sc);
}
if ((*fetch)(sc) != 0)
return tryendpoint(sc, fetch, next);
return (0);
}
int
ec2(struct system_config *sc)
{
free(sc->sc_username);
if ((sc->sc_username = strdup("ec2-user")) == NULL ||
(sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
if ((sc->sc_username = strdup("ec2-user")) == NULL) {
log_warnx("failed to set default user");
return (-1);
}
sc->sc_stack = "ec2";
return (cloudinit_fetch(sc));
sc->sc_dhcpendpoint = 1;
return tryendpoint(sc, cloudinit_fetch, NULL);
}
int
cloudinit(struct system_config *sc)
{
if ((dhcp_getendpoint(sc) == -1) &&
(sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
return (-1);
}
sc->sc_stack = "cloudinit";
return (cloudinit_fetch(sc));
sc->sc_dhcpendpoint = 0;
return tryendpoint(sc, cloudinit_fetch, NULL);
}
static int

4
agent/main.h
View file

@ -76,6 +76,7 @@ struct system_config {
char *sc_pubkey;
char *sc_userdata;
char *sc_endpoint;
int sc_dhcpendpoint;
char *sc_instance;
int sc_timeout;
@ -123,6 +124,9 @@ int azure(struct system_config *);
/* cloudinit.c */
int ec2(struct system_config *);
int cloudinit(struct system_config *);
int tryendpoint(struct system_config *,
int (fetch)(struct system_config *),
int (next)(struct system_config *));
/* opennebula.c */
int opennebula(struct system_config *);

14
agent/openstack.c
View file

@ -31,21 +31,11 @@
static int openstack_fetch(struct system_config *);
int
openstack(struct system_config *sc)
{
if ((dhcp_getendpoint(sc) == -1) &&
(sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
return (-1);
}
if (openstack_fetch(sc) != 0) {
free(sc->sc_endpoint);
return (cloudinit(sc));
}
return (0);
return tryendpoint(sc, openstack_fetch, cloudinit);
}
static int